Loading...
HSChapter 84
U.S. imports of dividing heads & special attachments for machine tools (HS 846630) totaled $9.1M in May 2026, traded with 38 countries.
Importers of Dividing Heads & Special Attachments for Machine Tools paid $1.1M in duties in May 2026 — an effective duty rate of 15% on $7.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: May 2026 dataDividing heads (8466301000) — indexing devices that rotate a workpiece to precise angular positions — and the broader category of special machine-tool attachments serve gear hobbing, milling, and grinding operations across precision manufacturing. Germany leads US imports under this heading, consistent with its dominance in high-accuracy machine-tool accessories, with Canada, Taiwan, Japan, and Italy also significant sources. The US schedule separates dividing heads from woodworking-machine attachments (8466306040), general machine attachments (8466306085), and NESOI attachments (8466308000), so the intended host machine type is the primary classification driver. Importers of CNC rotary tables and indexing fixtures should confirm whether the device qualifies as a dividing head or falls under the broader attachment lines.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A traditional dividing head provides manual or semi-automatic angular indexing. A fully programmable CNC rotary table may be classified as a special attachment (8466306085 or 8466308000) rather than a dividing head, depending on its design and the degree of integration with the host machine's control system. A binding ruling from CBP is advisable for high-value CNC rotary units where the distinction is not clear-cut.
Yes. The US tariff schedule under this heading specifically breaks out attachments for woodworking machine tools (8466306040) from those for other machine tools (8466306085 and 8466308000). The nature of the host machine — woodworking versus metalworking or other — is therefore the first classification question an importer must resolve.
Supplier Network
Get discovered by U.S. importers searching for HS 846630 — Dividing Heads & Special Attachments for Machine Tools. Be the first supplier listed.
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8466306085 | MACHINES AS SPECIAL ATTACHMENTS FOR MACHINE TOOLS | $3.8M | 13.62% | 98.63% | $520K |
| 8466308000 | SPEC ATTACH, NESOI, FOR MACH TOOLS | $3.1M | 13.79% | 71.90% | $424K |
| 8466306040 | SPECIAL ATTCHMNTS FOR WDWRKING MACH TOOLS | $1.4M | 6.46% | 46.73% | $93K |
| 8466301000 | DIVIDING HEADS FOR MACHINE TOOLS | $1.1M | 11.91% | 89.38% | $127K |
MACHINES AS SPECIAL ATTACHMENTS FOR MACHINE TOOLS
SPEC ATTACH, NESOI, FOR MACH TOOLS
SPECIAL ATTCHMNTS FOR WDWRKING MACH TOOLS
DIVIDING HEADS FOR MACHINE TOOLS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8466306085 | MACHINES AS SPECIAL ATTACHMENTS FOR MACHINE TOOLS | $4.0M |
| 8466308000 | SPEC ATTACH, NESOI, FOR MACH TOOLS | $1.8M |
| 8466301000 | DIVIDING HEADS FOR MACHINE TOOLS | $285K |
| 8466306040 | SPECIAL ATTCHMNTS FOR WDWRKING MACH TOOLS | $33K |
MACHINES AS SPECIAL ATTACHMENTS FOR MACHINE TOOLS
7.5K no
SPEC ATTACH, NESOI, FOR MACH TOOLS
6.9K no
DIVIDING HEADS FOR MACHINE TOOLS
2.1K no
SPECIAL ATTCHMNTS FOR WDWRKING MACH TOOLS
364 no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Arizona | -- | $2.7M | +$2.7M |
| Missouri | $1.4M | -- | -$1.4M |
| California | $977K | $325K | -$652K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | -- | $2.3M | +$2.3M |
| LOS ANGELES, CA | $1.8M | $274K | -$1.6M |
| NEWARK, NJ | $1.7M | -- | -$1.7M |